xaml-designer

Silverlight 4, WCF and Relative URI error

I get this error System.UriFormatException [net_uri_BadFormat] Arguments: Debugging resource strings are unavailable. Often the key and arguments provide sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?linkid=106663&Version=4.0.50826.0&File=System.dll&Key=net_uri_BadFormat at System.Ur...

How can I include custom attributes in the XAML's UserControl by creating a schema located on my hard disk

I need to include a custom attribute "ICON" in the UserControl of my XAML. Is there a way I can do this by creating a schema (.xsd ) file (located on my harddisk) and referring to it from the XAML? Please note that I don't have the option of using an Assembly. Below is a snippet of the XAML's UserControl which uses the ICON attribute: ...